题解 | #计算某字符出现次数#

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        String str=sc.nextLine().trim();
        char strc=sc.next().trim().charAt(0);
        
        int count=0;
        for(int i=0;i<str.length();i++){
            if(strc>='a'&&strc<='z'){
                if(strc==str.charAt(i)||(strc-32)==str.charAt(i)){
                    count++;
                }
            }else if(strc>='A'&&strc<='Z'){
                if(strc==str.charAt(i)||(strc+32)==str.charAt(i)){
                    count++;
                }
            }else{
                if(strc==str.charAt(i)){
                    count++;
                }
            }
        }
        System.out.println(count);
    }
}